Linux下推流屏幕出错
Invalid MIT-MAGIC-COOKIE-1 key[x11grab @ 0x5580691486e0] Cannot open display :0.0, error 1.
:0.0: Input/output error
echo $DISPLAY 查看设备代号 替换掉：0.0
参考：https://www.linuxquestions.org/questions/linux-desktop-74/ffmpeg-fails-cannot-open-display-0-0-error-1-a-4175613512/
